|Origin:||automatos 'acting by itself', from auto- ( AUTO-)|
an automatic machine is designed to work without needing someone to operate it for each part of a process:
an automatic weapon
an automatic gearbox
My camera is fully automatic.
something that is automatic always happens as a result of something you have done, especially because of a rule or law:
Littering results in an automatic fine.
done without thinking, especially because you have done the same thing many times before:
Practise the breathing techniques until they become automatic.